Fracture performance of GFRP-RC beams with working cracks in alkaline environment for eight years

With technology of FRP reinforcement concrete beams is applied in domain of the civil engineering, it attracts more and more scholars to study it. The paper studied of the flexural fracture performance of FRP reinforced RC beams, bringing forward how to calculate the flexural failure of FRP reinforced concrete beam, namely: bearing capacity formula about broken FRP and crushed concrete on compression zone, through comparison between calculated values and tests values, it is discovered that the numerical analysis and test result is fitting approximately, it is validated that the formula can well analyze flexural of FRP reinforced RC beams.

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Fracture Performance of GFRP Bars Embedded in Concrete Beams with Cracks in an Alkaline Environment

Journal of Composites for Construction ◽

10.1061/(asce)cc.1943-5614.0000688 ◽

2016 ◽

Vol 20 (6) ◽

pp. 04016040 ◽

Cited By ~ 6

Author(s):

Wen-rui Yang ◽

Xiong-jun He ◽

Li Dai ◽

Xia Zhao ◽

Feng Shen

Keyword(s):

Concrete Beams ◽

Alkaline Environment ◽

Gfrp Bars ◽

Fracture Performance

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Behavior of RC Beams Strengthened by CFRP and Steel Rope under Frequent Impact Load

Journal of Advanced Sciences and Engineering Technologies ◽

10.32441/jaset.001.1.05 ◽

2018 ◽

Vol 1 (1) ◽

pp. 30-42

Author(s):

Muataz Ali ◽

◽

Yaseen Saleh ◽

Luna Al Hasani ◽

Ammar Khazaal ◽

...

Keyword(s):

Impact Load ◽

Rc Beams ◽

Steel Rope

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Effects of randomness in steel mechanical properties on rotational capacity of RC beams

Materials and Structures ◽

10.1617/13591 ◽

2005 ◽

Vol 34 (236) ◽

pp. 92-99

Author(s):

M. De Stefano

Keyword(s):

Mechanical Properties ◽

Rc Beams

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Synthesis, Characterization and in-vitro drug release studies of a macromolecular prodrug of Didanosine.

International Journal of Drug Delivery Technology ◽

10.25258/ijddt.v2i2.8845 ◽

2010 ◽

Vol 2 (2) ◽

Author(s):

Neeraj Agrawal ◽

M.J. Chandrasekar ◽

U.V. Sara ◽

Rohini A.

Keyword(s):

Drug Release ◽

Drug Level ◽

Drug Release Profile ◽

Sustained Drug Release ◽

In Vitro Drug Release ◽

Alkaline Environment ◽

Stomach Acid ◽

Release Studies ◽

Macromolecular Prodrug

A macromolecular prodrug of didanosine (ddI) for oral administration was synthesized and evaluated for in-vitro drug release profile. Didanosine was first coupled to 2-hydroxy ethyl methacrylate (HEMA) through a succinic spacer to form HEMA-Suc-ddI monomeric conjugate which was subsequently polymerized to yield Poly(HEMA-Suc-ddI) conjugate. The structures of the synthesized compounds were characterized by FT-IR, Mass and 1H-NMR spectroscopy. The prodrug was subjected for in-vitro drug release studies in buffers of pH 1.2 and 7.4 mimicking the upper and lower GIT. The results showed that the drug release from the polymeric backbone takes place in a sustained manner over a period of 24 h and the amount of drug released was comparatively higher at pH 7.4 indicating that the drug release takes place predominantly at the alkaline environment of the lower GIT rather than at the acidic environment of the upper GIT. This pH dependent sustained drug release behavior of the prodrug may be capable of reducing the dose limiting toxicities by maintaining the plasma drug level within the therapeutic range and increasing t1/2 of ddI. Moreover, the bioavailability of the drug should be improved as the prodrug releases ddI predominantly in the alkaline environment which will reduce the degradation of ddI in the stomach acid.

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